Nitrogen solid Raman spectra

Raman spectroscopy provide complementary information to IR in that bands that are inactive in IR often are active in Raman, and vice versa. The Raman spectrum of 1 consists of three bands with relatively high intensity [37, 38], while the corresponding spectrum for 3 has two strong and one weaker line [37]. Thus, in contrast to IR, Raman provides a tool for fingerprinting of both molecules even without the use of isotopic labeling. In addition, the detection limit is expected to be lower in Raman than IR due to the very low intensities of the IR transitions. We have recently estimated the detection limit for 1 in liquid and solid nitrogen based on experimental measurements and computed Raman intensities for 1 and N2. The following expression was used to compute the detection limit ... 

Angell (1) has investigated the Raman spectra of acetonitrile, propylene, and acrolein on a number of zeolites and found that physical adsorption occurred. There are sufficient differences between the spectrum of the liquid and of the adsorbed species (e.g. the carbon-carbon double bond stretching in the case of propylene and the carbon-nitrogen triple bond stretching in the case of acetonitrile) to make it quite clear that it was not merely a case of condensation in the pores of the solid adsorbent. 

Solphur-Halogen Compoirads.— The Raman spectra of gaseous, liquid, and solid SF4 have been re-examined. Polarization measurements allowed the unambig-ous identification of the Ai modes. The i.r. spectrum of SF4, isolated in a nitrogen matrix, showed that the 353 cm absorption consists of two fundamentals, thus providing the hitherto missing ninth fundamental of SF4. 

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